Hatch dates and growth rates of grass carp (Ctenopharyngodon idellus) and silver carp (Hypophthalmichthys molitrix) juveniles in Three Gorges Reservoir, Lake Dongting and Lake Poyang

被引：4
|
作者：
Zhang W. [1 ,2 ]
Ma Q. [3 ]
Li M. [1 ]
Zhang C. [1 ,2 ]
Gao X. [1 ]
机构：
[1] Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan
[2] University of Chinese Academy of Sciences, Beijing
[3] Department of Biology, Nanchang Normal University, Nanchang
来源：
Hupo Kexue/Journal of Lake Sciences | 2020年 / 32卷 / 03期
关键词：
Early life history stage; Grass carp; Hatch date; Lake Dongting; Lake Poyang; Otolith; Silver carp; Three Gorges Reservoir;
D O I：
10.18307/2020.0320
中图分类号：
学科分类号：
摘要：
Juveniles of grass carp (Ctenopharyngodon idellus) and silver carp (Hypophthalmichthys molitrix) were collected in Three Gorges Reservoir (TGR), Lake Dongting and Lake Poyang from July to August 2017. Lapillar otoliths were extracted from the juveniles and were used to determine their hatch date and growth rates. The results indicated that the hatch dates of grass carp and silver carp were later in Lake Dongting than in TGR and Lake Poyang. Growth rates and otolith deposition rates of grass carp (Lake Dongting: P < 0.05, Lake Poyang: P > 0.05) and silver carp (P < 0.05) were higher in Lake Dongting and Lake Poyang than in TGR. However, the rates of the tow fishes had no significant differences between the two lakes (P > 0.05). We conclude that the impoundment of TGR has delayed the spawning time of grass carp and silver carp in the middle reaches of the Yangtze River. The juveniles grew faster in the two lakes. However, the intensive fishing in the two lakes reduced the population abundance of grass carp and silver carp significantly. At present, the complete fishing ban is being implemented in the Yangtze Basin. This measure will play a key role in restoring fish resources. Besides fishing ban, it is also suggested to protect the habitat and spawning grounds of fishes, to increase river-lake connectivity, to release more adult fishes, and to carry out ecological regulation. © 2020 by Journal of Lake Sciences.
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页码：804 / 812
页数：8
相关论文
共 42 条
  • [1] China fishery statistical yearbook: first edition, (2018)
  • [2] Yi BL, Yu ZT, Liang ZS, Et al., Gezhouba water control project and four famous fishes in Yangtze River: First edition, pp. 1-46, (1988)
  • [3] Li MZ., Study on the life history strategies of fishes in the Yangtze River and its adaption to environment during early life history stage [Dissertation], (2012)
  • [4] Wang JN, Li C, Liao WG., Impacts of the regulation of Three Gorges-Gezhouba cascaded reservoirs on downstream eco-hydrology, Journal of Hydroelectric Engineering, 30, 2, pp. 84-90, (2011)
  • [5] Yang Z, Gong Y, Dong C, Et al., Temporal and spatial distribution of the four major Chinese carp species in Three Gorges Reservoir during the normal operating period, Journal of Hydroecology, 38, 5, pp. 72-79, (2017)
  • [6] Guan XH, Cao WX., Study on the hatch date and growth of juvenile grass carp from middle reaches of the Yangtze River using daily increment technology, Acta Hydrobiologica Sinica, 31, 1, pp. 18-23, (2007)
  • [7] Zeng XB, Zhang GH., Species identification at the larval and juvenile stages for several Chinese domestic fishes by elliptical Fourier analysis of otolith form, Journal of Fishery Sciences of China, 19, 6, pp. 970-977, (2012)
  • [8] Chang JB, Deng ZL, Sun JY, Et al., Daily increments of otoliths in larvae and juveniles of grass carp, Ctenopharygodon idellus, Sixtieth Anniversary of the Founding of China Zoological Society Memorial Volume Dedicated to the Hundredth Anniversary of the Birthday of the Late Prof, pp. 323-329, (1994)
  • [9] Wang HL, Li MZ, Gao X, Et al., The status of the early stage fish resources in the Fengdu section of the Three Gorges reservoir, Acta Hydrobiologica Sinica, 39, 5, pp. 954-964, (2015)
  • [10] Jiang W., Studies on fish early resources in the main stream of state-level natural protection area for rare and endemic fishes in the upper Yangtze River [Dissertation], (2009)
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